I'll seccond the T616 for someone who isn't too interested in the "features" newer phones provide. The T616 is a good phone - SE got the bluetooth, battery and UI right for the phone. The camera sucks, but they all do...

The V505 is probably the best flip phone at&t has at the moment. It'll cost more, however.

(No bluetooth is a deal breaker for me, so I don't consider the non-bluetooth phones an option... so take my advice with a grain of salt)

Matthew